'''
#conding:utf-8
print("你好 赛利亚")


# 变量

a = 1

a = 1
b = 2

a = 1
b = a

a = 12
a = 15  #改的是指向

a_ = 12
a1 = 13
a_1 = 14

print = 12
print(print)


a = 12
A = 13


age = 22

AlexAge = 98
alex_age = 98


a9 = 1
9a = 1
_ = 2

a_1 = 1
_a = 2
a- = 1
1_a = 2


age = 18
age1 = 30
age2 = age
age = 19

age age1 age2

'''

'''


# 注释
'''

# 基础数据类型初识
#数字：
'''
print(23+37)
print(23-2)
print(2*6)
print(6/3)
'''
#字符串：
# pyhton中只要是用引号 引起来就是字符串


# a = 'abc'
# b = "nihao"
# """shijie"""
# print(c)

'''
a = 'alex'
b = 'wusir'

print(a + b)  # 字符串拼接  

a = '坚强'

print(a * b)
'''

#print(3>2)   True -- 真
#print(3<2)   False -- 假

# 用户输入 input


# user = input(">>>")  # 提示语句 
# print(2)

'''
my_input = int(input(123))
num = my_input + 5
print(num)
'''
# input获取到的全部都是字符串类型

'''
my_input = input('>>>')
print(type(my_input))
'''



#if - 如果  - 选择  5种

# 单纯选择  #
'''
if 条件:  # 条件 判断 > < == 
	print(1)  # 条件成立后执行的事情
'''

'''
print(123)

if 3>4:
    print(1)
	
print(4)

if 3<5:
    print(11)
	
print(6)
'''


# if else  #二选一


'''
print(1)

if 3<2:
	print(11)
	print(23)
	my_input = input("请输入内容：")
	print(my_input)
else:
    print(45)
print(3)
'''

# if elif elif else   # 单选

'''
print(22)

if 3<2:   # A
    print(1)

elif 4>3: # B
    print(2)
	
elif 4>2: # C
    print(3)

elif 4>1: # D
    print(4)
	
else: # 以上都不对，else就是必选
	print(44)

'''

# if if if if  #多选题
'''
if 3>2:   #A
    print(1)
if 4>3:   #B
    print(2)
if 5<9:   #C
    print(3)
if 9>7:   #D
    print(4)
'''
	

# 嵌套if

'''
sex = '女'
age = 20

if sex == '女':  #判断等于不等于  == 
	if age > 18:
		print('进来坐一坐')
		if 3>2:
			print(1)
		else:
			print(111)
	else:
		print("回去上学吧")
else:
	print('滚')

'''

'''
if 4>3:
    if 3>2:
        print(1)
    elif 4>3:
	    print(2)
else:
    if 4>3:
	    print(3)
    if 5<3:
	    print(4)
	

'''



